Right-handed comfort in a ergonomically-designed plug-n-play mouse. The Kensington Pro fit (TM) Full-Size wireless mouse has an ergonomic, right-handed shape With a soft rubber grip for all-day comfort. It features a high-definition optical sensor with a pointer speed quick-select button for enhanced productivity. It uses 2. 4 GHz wireless for long range with minimal interference. And it is built to last with a limited lifetime .